The R is 21"front wheel the standard is 19" from what we see.lol
some quick math.... new R is about 13 pounds heavier (Wet with same fuel load of 5 gallons) than 2012 model. note 2013 can carry about a extra gallon of fuel, so that maybe throwing your numbers off.
Ive ridden several RC8 they dont have stumble problem....hope this is true for this bike too.
This bike is bad as hell !
I got to go back to work lol
2013 KTM 500 EXC
2009 KTM 990 Standard
2014 1190 R